adjective, -li⋅er, -li⋅est, adverb, verb, -lied, -ly⋅ing.| 1. | not strong; unhealthy; ailing. |
| 2. | of, connected with, or arising from ill health: a sickly complexion. |
| 3. | marked by the prevalence of ill health, as a region: the epidemic left the town sickly. |
| 4. | causing sickness. |
| 5. | nauseating. |
| 6. | maudlin and insipid; mawkish: sickly sentimentality. |
| 7. | faint or feeble, as light or color. |
| 8. | in a sick or sickly manner. |
| 9. | to cover with a sickly hue. |